/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.queryengine.plan.planner.memory;

import org.apache.iotdb.db.queryengine.execution.operator.Operator;
import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNode;

public class PipelineMemoryEstimatorFactory {

  private PipelineMemoryEstimatorFactory() {
    // hidden constructor
  }

  public static PipelineMemoryEstimator createPipelineMemoryEstimator(
      final Operator rootOperator, final PlanNode root, final int dependencyPipelineIndex) {
    return isConsumeChildrenOneByOneNode(root)
        ? new ConsumeChildrenOneByOnePipelineMemoryEstimator(rootOperator, dependencyPipelineIndex)
        : new ConsumeAllChildrenPipelineMemoryEstimator(rootOperator, dependencyPipelineIndex);
  }

  public static boolean isConsumeChildrenOneByOneNode(final PlanNode node) {
    switch (node.getType()) {
      case SCHEMA_QUERY_MERGE:
      case COUNT_MERGE:
      case DEVICE_VIEW:
      case IDENTITY_SINK:
      case SCHEMA_FETCH_MERGE:
      case LAST_QUERY_COLLECT:
        return true;
      default:
        return false;
    }
  }
}
